Marathon 2.80/2.50- 4" Pneumatic (Air Filled) All Purpose Utility Tire on Wheel, 3" Centered Hub, 1/2" Bearings 2.80/2.50-4" (8.5" diameter) with 3" centered hub and 1/2" ball bearings. This tire and wheel assembly is commonly used as a caster on utility carts as well as small hand trucks (dollies) and other utility equipment. Comes pre-mounted on a solid steel, gray wheel for quick and easy installation. Tube type design makes fixing a flat as simple as installing and inflating a new inner tube, instead of replacing the whole assembly. Features a load capacity of 250 pounds and a jag tread for the perfect balance of traction and maneuverability.